Automatic stop means for awning-rolls.



W. R. CUNNINGHAM.

AUTOMATIC STOP MEANS FOR AWNING ROLLS.

APPLICATION FILED APR. 29.1916. 1,240,179. PatentedSept. 18, 1917.

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WILLIAM Ross CUNNINGHAM, or TOLEDO, OHIIO.

AUTOMATIC STOP MEANS FOR AWNING-ROLLS.

To alljwhom it may concern:

Be it known that 1, WILLIAM Ross CUN- NINGHAM, a citizen of the United States, and

a resident ofToledo, in the county of Lucas and State of Ohio, have inventeda certain new and useful Automatic Stop Means for Awning-Rolls; and I do hereby declare the following tobe a full, clear,.and exact .description of the invention, such as w1ll enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawlngs and to the characters of reference marked thereon, which form a part of this specification.

This invention relates particularly to means for limiting the unwinding movements of awning rolls or the like, and has for its object the provision of simple and improved means of this character which is automatically operable to lock the roll against further unwinding movements when a predetermined length of material has been unwound therefrom.

This invention is fully described in the following specification, and while, in its broader aspect, it is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings, in which- Figure 1 is a front elevation of a device embodying my invention with parts broken away. Fig. 2 is an enlarged section on the line 22 in Fig. 1. Fig. 3 is an enlarged'end view of Fig. 1 with the awning in completely wound-up position. Fig. 4 is areduced section on the line 4-4 in Fig. 3. Fig. 5 is an enlarged perspective view of the latch member embodyingmy invention, and Fig. 6 is a perspective view of a portion of a device embodying my invention with the awning in completely wound-up position and with parts broken away.

Referring to the drawings, 1 designates an awning orcurtain roll having trunnions 2 projecting from its ends and journaled in brackets 3, attached to a wall or suitable support 4. An awning or curtain 5 winds on the roll 1, being fixed thereto at its inner end and having its outer end connected, in the present instance, to an outwardly and downwardly swinging frame 6.

A collar or annular flange 7 is secured to one end of the roll andis provided with an annular series of holes 8, into any one of which a bolt 9, or other suitable pivot mem- Specification of Letters Patent.

Patented Sept. 18, 1917.

Application filed April 29, 1916. Serial No. 94,390.

ber, carrying a latch 10,.may be inserted. A finger 11 fixedly projects from the outer edge of the latch 10 around the collar 7 and inward adjacent to the roll surface, and thence extends a short distance lengthwise of the roll parallel thereto in position to be en gaged and drawn to the roll by the adjacent edge portion of a predetermined convolution of the awning or curtain 5 when wound on the roll, as shown in Fig. 4. When the finger 11 is held to the roll in this manner the latch 10 is held in the released or inoperative position shown in Fig. 3 with the catch shoulder 12 thereof drawn inward in position to cause it when revolved with the roll to escape contact with the stop finger 13, which projects from the adjacent bracket 3.

Upon a release of the finger 11 by the awning or curtain 5 during an unwinding movement thereof, the latch 10 swings outward by either gravity or centrifugal action, or both, into position for its shoulder 12 to coact with the stop finger 13 in the direction of unwinding movement of the latch, as shown in Fig. 2, and prevents a further paying out or unwinding of the curtain, as is apparent. The outward swinging movement of the latch is limited by an outwardly projecting finger 14 at the inner end thereof striking against the adjacent trunnion 2, or a collar or shoulder 15 thereon.

It is evident that upon a rewinding of the member 5 the finger 11 will be drawn inward thereby and a retacting or inward drawing of the latch 10 to its inoperative position efiected.

I wish it understood that my invention is not limited to any specific construction, arrangement, or form of the parts, as it is capable of numerous modifications without departing from the spirit of the claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. The combination with a roll, and a member for winding thereon, of a latch pivotally carried by the roll for transverse swinging movements relative thereto and adapted to swing outward with respect to the roll axis by gravity action when at a pre determined point in its turning movement with the roll, the pivot of said latch being adjustable around the roll axis a part fixedly projecting from said latch transversely thereof and lengthwise of the roll to pro ject between predetermined convolutions of said member, whereby the latch will be held in inwardly drawn position by the engage-v ment of a convolution of the member with said part, and a stationary stop part with which said latch coacts to stop an unwinding m em nt t the 1 wh e latch s in its outer operative position.

' 2. In combination, a bracket, a roll hav ing a trunnion journaled in said bracket, a collar'fixed to said roll adjacent to said bracket, a latch pivoted to said collar and having a finger projecting from its inner end for coacting with said trunnion to limit the outward swingingmovements of the latch, the latch pivot being adjustable on Copies of this patent may be obtained for collar and also having a part projecting In testimony whereof, I have hereunto signed my name to this specification.

WILLIAM ROSS GUNNINGrHAM'.

five cents each, by addressing the Commissioner olifatents, Washington, D. G. 1 

